<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <ul id="ul">
        <li>1</li>
        <li>2</li>
        <li>3</li>
    </ul>
</body>
<script>

    // const list = document.querySelectorAll('li');
    // function foo(e) {
    //     console.log(e.target.innerHtml);
    // }
    // for (let item of object) {
    //     item.onclick = foo;
    // }


    function foo(e) {
        const obj = e.target;
        if (obj.nodeName.toLowerCase() == 'li') {
            console.log(obj.innerHtml);
        }
    }
    const oUl = document.getElementById('ul');
    oUl.addEventListener('click', foo, true);





</script>
</html>